5 and that is what I purchased. Weight:G502: 140gVTsing: 122gThe buttons feel pretty much the same as the G502 and a nice click feel. These sandals were inexpensive but a bit uncomfortable to wear. I was able to walk on the court and play! If they ever lose their shape or wear down over months of use, I would just buy again. Took it out for a test drive last night and was very impressed by the lights. If you guys gont love this I dont know what you guys would love! I have a 15” laptop and although my laptop is a slight bit bigger the tray still holds it perfectly without any wiggle or movement when I type. I have been into powerlifting for a while now, and this is by far my favorite belt I’ve ever used. The noise cancellation quality of this headset is also very amazing.